Reversing mechanism for calculating-machines.



A. HANTSUH.

REVERSING MECHANISM FOR CALCULATING MACHINES.

APPLICATION FILED SEPT.17, 191-2.

1,074,087. 7 Patented Sept. 23,1913.

f 5 V Fl .1 73

f I l I Nrrnn srarns PATENT OFFICE.

ARTHUR HANTSCH, 0F LINDEN, NEW JERSEY,

REVERSING .MECHANI$IVT FOR CALCULATING-MACHINES.

Specification of Letters fatent.

Application filed September 17, 1912. Serial No. 720,732.

'lowing is a specification.

This invention relates to improvements in reversing mechanism for calculatlng niachin o hav n g two counting mechamsms, one

of which may be used for multiplication,

the other of which may be used for division. As is well known in the art the reversing mechanism comprises generally a set of reversing wheels adapted to be moved into either one of two predetermined positions to engage the counting wheels. The operation of the reversing wheels or gears is accomplished by means of the shifting of a reversing bar adapted to engage all of said wheels to move the same.

The object of the invention is to provide a mechanism whereby this shift ng motion of the reversing bar may be accomplished with 'ease and certainty, also to provide means whereby the shifting of saidbar becomes impossible except when the operating handle of the machine stands in neutral position.

To this end the invention is embodied in a construction as hereinafter set forth and the novelty of which is pointed out in the claims and as illustrated inthe accompanying drawing in which- .tFigure l is a fragmentary plan View of a calculating machine exposing the reversing wheels by having the slide rule folded back. Fig. 2 is an end elevation showing the re versing mechanism embodying this invention and partly in section. Fig. 3 is a detail view showing parts of the reversing mechanism in a position different from that shown in Fig. 2 and Fig. 4 is a detail View of the parts .which prevent untimely shifting of the reversing wheels.

In the drawings 1 represents the frame of the machine, 2 is the slide rule, operable lengthwise on the shaft 4 being hinged to the frame at 5, 5. i i

3 is the usual cover plate.

The reversing wheels 51- are as usual slida mounted on square shafts 52 supportedin" he frame-and are operated into the posi-' tion shown in Fig. 1 for multiplication or moved back a short distance for division.

time.

frame work at and 61. The bar 59 has two openings 80 through which pass the cam plungers 62 and 63 each-having a cam es and interconnected at their lower ends by the rock arm 65 pivoted at 66.- ,The plunger-s project above theplate 3 so as to be in view of the operator and are provided with buttons 67' and 68. When the reversing wheels are to be moved into position for.

division, the operator presses down the button 67 and the cam 64 on plunger 62 forces the reciprocating liar 59 to the left in Fig. 2, the plunger 63 moving up at the same The movement of the bar 59 actuates the bell crank 56 to pull or push the reversing slide bar 53 to the right which latter is guided in its movement by pins 70 and cutouts 71. The reversing wheels cannot be shifted, however, unless the crank 50 stands in its neutral position as shown in Fig. l.

The crank operates the main shaft 72, as usual. The shaft 72 carries a gear 73 which meshes with a gear 74 on a shaft 75. The latter carries a disk 76, cut away as at 77, Fig. 4.

'78 is a fingersecuredto the reciprocating bar '53.

If the crank 70 is not in neutral position the disk 76 will be turned as in Fig. 4 and be in the way of the finger 78 and'thus pre vents shifting of the bar 59 hence the changing of the reversing wheels. But when the crank is in neutral position as in Figs. 1 and 2, the cut at 77 is nearest the finger 78 and shifting can take place.

It will be seen that the operator is able to work the reversing wheels by a short push on the button 67 or 68, and that the bar 59 stays locked in either of its posit-ions because at that time one of the cams 64 are down to full stop and prevents movement of said bar.

Theswinging motion of, the bell crank and the inclined surfacs of the cut outs 70 causes the bar 59 to move easily in an .oblique direction and prevents jar and shock to the mechanism. It will be seen that this mechanism is certain in its operation and easily handled by the operator. Another advantage is that the motion of the bell crank is in the same direction as the movement of the bar 53, hence causes no binding or sticking such as might be the case when a pin and slot connection'is used.

I claim:

1. In a reversing mechanism for calculating machines the combination of reversing wheels, a reversing bar for shifting said wheels, a reciprocating bar connected to said reversing bar for operating the same and vertically movable'cams for actuating said reciprocating bar.

2. In a reversing mechanism for calculating machines the combination of reversing Wheels, a reversing bar for shifting said Wheels and having cut out portions forming oblique guide faces, fixed pins for said guide faces, a bell crank pivoted to said reversing bar to operate the same in an oblique direction guided by said pins, vertically movable cam members for operating said bell crank and operating connections between said cam members and the bell crank.

3. In a reversing mechanism for calculat ing machines, the combination with a frame and acover plate, a plurality of reversing Wheels, a reversing bar for shifting said wheels, a bell crank pivoted on said frame and connected with its one arm to said reversing bar, a reciprocating bar supported in the frame and connected to the other arm 'of said bell crank, vertically movable cam members below said cover plate for operating said reciprocating bar andmeans projecting through and above said cover plate tor actuating said cam members.

4. In a reversing mechanism for calcnlat ing machines, the combination of reversing Wheels, a reversing bar for shifting the same, a reciprocating bar for actuating said reversing bar and movable cam members for operating said reciprocating bar and for locking the same at the end of its movement in either direction.

5 In a reversing mechanism for calculatin'gmachines, the combination of reversing wheels, a member for moving the same into one of two different positions, a reciprocating bar for operating said member and hav-.

ing two slots and cams adapted to engage said slots to operate said bar and tolock the same and the reversing wheels in a given po sitiona 6. In a reversing mechanism for calculating machines, the combination of reversing wheels, a sliding member provided with slots, a rock arm, plunger-s connected to the latter, cams on said plungers adapted to engage said slots alternately to reciprocate said sliding member to move the same and lock it at the end of its movement in either i direction and operating connections between said sliding member and said reversing wheels.

7. In a reversing mechanism for calculating machines, the combination of reversing wheels, a shdmg member havlng slots, cams adapted to move in said slots to actuate said sliding member, operating connections between the latter and said reversing wheels and means for operating said cams.

8. In a reversing mechanism for calculating machines, the combination of reversing wheels, a reciprocating bar, a rock arm, means connected to said rock arm and disconnected from said bar to operate the latter, operating connections between said bar and said reversing wheels and means for actuating said rock arms. I

9. In a reversing mechanism for calculating machines, the combination of reversing wheels, a reversing bar for shifting the same and having obliquely cut out guide portions on its opposite edges, pins fitted to cooperate with said guide portions, a reciprocating bar, a bell crank connecting the said two bars and verticaly movable cam members for operating said reciprocating bar.

10. In a reversing mechanism for calcu1ating machines, the combination of reversing wheels, a reciprocating bar having slots, interconnected cam members movable in said slots for reciprocating said bar and for locking the same at the end of its movement in either direction,means for operating said interconnected cam members and operating connections between said bar and the said reversing Wheels.

11. In a reversing mechanism for calculating machines, the combination of reversing wheels, a reversing bar for shifting said wheels, a reciprocating bar for operating said reversing bar, an operating crank handle, means for operating said reciprocating bar and means carried by the latter for preventing the operation thereof ivhen said crank stands in other but zero position.

Signed at New York, N, Y., this 13 day of Septr. 1912. I ARTHUR HANTSGH.

Witnesses:

IVAN KONIGSBERG, K. G. LEARD;

ssing the Gommissioner or Patents,

Washington, D. G. 

